Merge branch 'gcc_syslibs'

* From now on, the gcc-specific system libraries (libgcc, libsupc++ and
  libstdc++) are provided by separate packages built along with gcc:
  - gcc_syslibs contains the shared libraries (libgcc_s.so, libsupc++.so and
    libstdc++.so)
  - gcc_syslibs_devel contains the static libraries and both c++ and gcc
    headers
  The shared libraries now make proper use of symbol versioning and there
  are version-specific symlinks
* The buildsystem has been adjusted to no longer use the libraries and
  headers from the cross-compiler, but use the ones provided by the
  above-mentioned packages. The only exception is that the 32-bit libraries
  required for the bootloader of the x86_64 architecture are still taken
  from the cross-compiler.

build/jam/repositories/HaikuPorts/x86

@@ -44,7 +44,9 @@ RemotePackageRepository HaikuPorts
 	freetype-2.5.2-3
 	freetype_devel-2.5.2-3
 	gawk-4.1.0-2
-	gcc-4.8.3_2014_05_28-2
+	gcc-4.8.3_2014_07_26-1
+	gcc_syslibs-4.8.3_2014_07_26-1
+	gcc_syslibs_devel-4.8.3_2014_07_26-1
 	gettext-0.18.1.1-5
 	gettext_libintl-0.18.1.1-5
 	git-1.8.3.4-2
@@ -177,6 +179,7 @@ RemotePackageRepository HaikuPorts
 	freetype_x86_gcc2-2.5.2-3
 	freetype_x86_gcc2_devel-2.5.2-3
 	gcc_x86_gcc2-2.95.3_2014_07_26-1
+	gcc_x86_gcc2_syslibs_devel-2.95.3_2014_07_26-1
 	gettext_x86_gcc2-0.18.1.1-5
 	gettext_x86_gcc2_libintl-0.18.1.1-5
 	glu_x86_gcc2-9.0.0-2
@@ -244,7 +247,7 @@ RemotePackageRepository HaikuPorts
 	fossil
 	freetype
 	gawk
-#	gcc
+	gcc
 	gcc_x86_gcc2
 	gettext
 	git